To get an idea of exactly how small the worldâs smallest insect is, take out a ruler and look at those tiny lines that appear in between centimeters (make sure youâre not on the side that measures in inches). If in doubt, ask a grown-up to help you find the millimeters.
Diarrhea can also cause weight loss. Abdominal pain is another symptom of colon cancer that may prevent you from eating normally. If you have lost a significant amount of weight accompanied with these symptoms, you need to talk to your doctor immediately to determine the cause.
1 You have bloody diarrhea. 2  You have abdominal pain that is not relieved by vomiting and/or diarrhea (that is, abdominal pain is unrelated to episodes of vomiting or diarrhea).  You have insulin-dependent diabetes and experience vomiting, diarrhea or nausea.